...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::contract::condition_if — Select compilation and execution of a boolean functor template condition using a nullary boolean meta-function (not needed on C++17 compilers, use if constexpr
instead).
// In header: <boost/contract/call_if.hpp> template<typename Pred, typename Then> bool condition_if(Then f, bool else_ = true);
This is equivalent to boost::contract::condition_if_c<Pred::value>(f, else_)
. Compile and execute the nullary boolean functor template call f()
if and only if the specified nullary boolean meta-function Pred::value
is true
, otherwise trivially return else_
(true
by default) at run-time.
See Also:
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Boolean value returned by |